Notes: I favour the Small-pearl Bordered Fritillary (SPBF) because the chevrons near the outer wing margins are joined to the surrounding markings, in the PBF these chevrons are floating without touching the markings around it. Secondly the row of dots above the chevrons are situated nearer the chevrons, in the PBF they are midway between the chevron and the next marking.

Other observations of Small Pearl-bordered Fritillary (Boloria selene)

Species with which Small Pearl-bordered Fritillary (Boloria selene) interacts

Comments

Hi Phil, I note your revised ID and caution over these two very similar butterflies. However it has passed both tests on it's upper side markings so I'm inclined towards the SPBF. If it were only one pass I would agree with you. Regards Chris.